Pedestal bending machine



Much 11, 1930.

H. E; HARVEY r-.TAL PEDESTAL BENmNG MACHINE 2 shegts-sneef. 1

-' Filed may 15.` 1925 w RM By l

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GRNEYS March M, w30/1.

H. 1E. HAayr-:Y ET AL 1,750,103 PED'ESTAL -BENDING MAHINE Fied May 15,192e 2 sheets-sheet 2 Etf . ATTORNEYS` 4 40 ally extending Panarea Mar.-11-, leso UNITED STATES PATENT OFFICE HARRY E. HARVEY AND EARL x.EoLnEs, or CLEVELAND, omo, AssIcNons, EE

MESNE ASSIGNMENTS, T STEEL AND TUBES, INC., 0F CLEVELAND, OHIO, A COB-IORATION OF OHIO PEDESTAL A IBENDING MACHINE Applicatm med May 1a, 192e.serial No. 108,835.

This invention relates to the art of bending metallic articles, and isespecially concerned with the construction of new and improved apparatus1for bending elongated metallic articles, particularly pipe, which maybe constructed at relatively low expense and which is simple and easy tooperate and is, to a certain extent,automatic in operation.

A chief object is to provide an apparatus which will bend light gaugetubing without substantial reduction in` area, formation of wrinkles .orvother marks of objectionable character.

A further object is to provideapparatus for bending a .metallic article,particularly a tube,'into a plurality of planes.y

. Other objects will appear and be pointed out hereinafter. ,y

In the drawings attachedto and forming a part of this application- Fig.1 is a top plan view of one form of y apparatus embodying my invention;

' 1g. o paratus of Fig. 1;. Y

Fig. 3 is an end elevation taken in the direction indicated by line 3-3of Fi 1;

f Fig. 4 is a longitudinal section o a valve piston; and

Fi ."5'is a fragmentary'top planview v3Q showing the-bending roll and`follower shoe alslsembled with-the adjacent parts of the maj In the'ydrawings in which we haveillustrated one form of our` invention," 1designates a hollow basey comprising a circular v o 'housing having anoffset extension 2.` On top of the base 1 'is mounted a edestal 3 whichtapers up andwhich carriesnear its' 'upper end ajlater-V narrow bed 4supported at `its outer `end by a leg 5. A bending roll 'shaft' -6extends in an upright position through the pedestal 3 and 1s supportedon the top of the bed 4by an outstanding annular flange 7 which restsupon a suitably `worm gear 2 is a front sideelevation of the ap:y

'e roller C is securedto roll A as yshown in wardly to smallimensionsflanged bushing8, the lower end of the shaft 6 being providedwith a suitable bushing 9 supported in a bearing socket 10 carriedV bythe base 1. This socket 10 may conveniently be carried by a cross wall11 of the housing 1 and provides a bearing face to`suppo1t a ring gear12 keyed to the shaft 6. This gear 12 .meshes with a worm gear 13rotatably mounted in the offset rojection 2 of the housing 1. A drivesha 15 is keyed to the 13 and communicates with two oppositely drivendrive pulleys 16 and 17 which normally rotate relative to the shaft 15but which may be engaged to drive the latter by means of a clutch 18actuated by a clutch lever 19 and a clutch shaft 20. The actuation ofthe shaft 20 will presently be described in more detail.

The bending roll shaft 6 carries near its upper end a collar' 21 clampedabout a collar on the shaft 6 so as to rotate therewith. This collar-21is slit circumferentially as at 22 and twov similardogs 23a and 23hareadjustably ysecured in the slit 22 so as to en age with a lever 24presently to be describe 70 A suitable vbending roll A is keyed to theshaft 6 above the collar21 and is of such size asv to cooperate withfollower shoe B which is backed by a keeper roll 25 rotatably mounted ona carriage or bracket 26 which bracket is mounted to slide betweenguides 27 on the top of the'bed 4 towardand away from the shaft 6' andits bending roll.

Fig. 5 in position to clamp a tube or article to be bent to the rollwhen shoe B is brought `to its operating position by roll ,25. The tubeor other article is 'first 'inserted between roll' 4 A and roller C,then shoe B is laced between the article and roll 25` en roll 25 is.moved 'toward roll A, the .article is 4secured to roll A so as to rotatewithit. A pair of eye-bolts 28 and a turnbuckle Y29 serve to connect thebracket 26 with a crank arm 30 keyed lto a shaft 31 which extends downthrough 9 the bed 4. The shaft 31 carries at its lower opposite to theend where the pipe 48 enters,

end a crank arm 32. A connecting rod 33 is fastened at one end to thecrank arm 32 and at the other end to a piston 34 reciprocably mounted ina cylinder 35 carried on the underside of the bed 4.

Means for actuating the roll 25 to its normal position is shown in thespring 36 while means for actuating it in the opposite directioncomprises Huid pressure means conducted to the cylinder 35 through pipe37 and a valve 38. Valve 38 is carried by the bed 4 and as showncomprises a cylinder within which is slidably mounted a circular valvepiston 39 connected to a rod 40 which eX- tends out through the end ofthe valve cylinder 38 and is connected to a hand lever 40.

yAn intake pipe 41 brings fluid under pressure, for example compressedair, into the cylinder 38 where, when the piston 39 is properlypositioned, it may pass through annular grooves in the cylinder liner42, thence into a recess 43 on the piston and out through the pipe 37into the cylinder35. When the piston 39 is moved so that the pistoncloses the inlet opening and connects the opening from pipe 37 with theoutlet 37', the pressure in the cylinder 35 is relieved and the spring36 is capable of retracting the bracket 26 to the position shown inFig. 1. It will be understood that the movement of the piston 34 resultsin a movement of the bracket 26 and the rotatably carried roll 25 towardthe shaft 6 and any bending roll carried thereon.

A second cylinder 44, similar in substantially all respects to cylinder38, may also be carried on the side of the bed 4 in a position similarto and closely adjacent to the cylinder 38. This cylinder is constructedwith a sleeve, corresponding to the sleeve 42 of cylinder 38, and with apiston similar to the piston 39. A connecting rod 45, similar insubstantially all respects to the connecting rod is secured to thepiston within the cylinder 44 and extends through one end of t ecylinder to engage with a coupling 46 which is secured pivotally to thelever 24, heretofore mentioned. This lever is pivoted near its lower endon a pin carried by the pedestal 3. The movement of the lever 24 aboutthis pivotal point carries with it the rod and moves the piston withinthe cylinder 44 lirst in a position to uncover and connect the inletpipe 47 and the outlet pipe 48 which leads to a cylinder 49 mounted onthe pedestal of base member 1. Fluid pressure in the cylinder 49 or pipe48 is exhausted through opening 49'l in the cylinder 44 when the pistonin the cylinder 44 is moved into' suitable position, in substantiallythesame manner as has been just described in connection with cylinder 38and piston 39.

Within the cylinder 49 a piston 49 is reciprocably mounted and carries,at its end a connecting rod which is adjustably connected to theclutch-shifter shaft 20 by a turnbuckle 51. The connecting rod has abearing in a bracket 52 which comprises a part of the cylinder assembly.Between the piston and the bracket 52 and surrounding the connecting rodis disposed a spring 53 capable of returning the piston within thecylinder to the end of the latter adjacent to the entrance of pipe 48when the fluid pressure within the cylinder is relieved.

Movement of the piston in cylinder 49 back and forth serves to move theclutchshifter 20 similarly and to engage or disengage the clutch 18 withthe drive pulleys 16 and 17.

The connecting rod is provided with a pin extending therethrough andindicated -by character 54. This pin projects through elongated openings54a in the forked end of a lever 54 keyed to a quadrant shaft 55. Thisquadrant shaft 55 extends across and is supported on the lower portionof the pedestal 3 by a bearing at either end and carries at the frontside of the machine a release lever 56 keyed to the shaft 55. This lever56 carries a dog 57 and a handle 58 for operating the same, the dogbeing disposed to engage with a quadrant 59 which has a stop 60. Thequadrant as shown is supported by suitable legs 61 on the pedestal 3.The elongated holes 54El in lever 54b permit the shaft 55 to be rotatedby the lever 56 and to move the shaft 20 back and forth so as to engageor ldisengage the clutch 18 with the drive pulleys 16 and 17.

The operation of the machine above described is substantially asfollows: An elongated metallic article to be bent is secured in positionbetween a suitable bending roll on shaft 6 and follower shoe supportedby the holding roll 25 on bracket 26, the hand lever 40 then beingactuated to permit fluid under pressure to be delivered into thecylinder 35 forcing out the piston and connecting rod 33, therebyturning the shaft 31 and moving the bracket 26 into holding positionwith respect to the article to be bent. If desired the piston 39 may bemoved into position to lock t-he pressure in the cylinder 35, as byclosing the intake opening from pipe 41; When'the article' to be benthas been fixed between the bending roll and the holding roll'25, themachine is ready to be actuated. The lever 56 is then moved to the leftby elevating the dog 57 out of contact with the stop 60, thereby movingthe clutch shaft 20 tothe left of the apparatus shown in Fi .,2, therebyengaging the clutch 18 with the rotates the drive shaft 15 and the worm13 turns the worm wheel 12 and with the latter vthe bending roll shaft6. This rotation continues unt1lthe dog 23* engages with the end of thelever 24 and moves the latter about lts pivot to shift the piston incylinder 44'so rive pulleyl6, thisv air from pipe 47 andl :pe 48 intothe cylinoutwardly l in the cylinder compressing the spring 53 andmoving the shaft 20, thereby disengaging the clutch 18 and drive pulley16 and then 'bringing the clutch 18 into engagement with the drivepulley 17. This movement of the clutch shifter 20 carries with it thelever 56 to the extreme end of the quadrant l59.v The drive pulley 17rotates the shaft 15 in. the opposite direction thereby returning theshaft 6 to its initial position where the dog 23h contacts with thelever2'4 moving it in the opposite direction about its pivot and movingthe piston in cylinder 44 so as to connect the pipe 48 With thedischarge outlet 50, thereby relieving pressure in the cylinder 49. Whenthe pressure in the cylinder 49 and against the piston therein is thusrelieved, the spring 53 is permitted to function and serves to move theclutch shifter shaft 20 to disengage the clutch 18 and drive pulley 17,this movement being accompanied by a corresponding 'movement of thelever 56 which movement is stopped or intercepted bythe stop 6() on thequadrant 59 with which-the dog 57 engages.

It is preferable that the lever be moved so that pressure from thecylinder 38 may be relieved through outlet 43 at about the time theshaft 6 ceases rotating in its initial direction and begins reversedrotation to restore it to its original position. When this is done thebent article may be removed from between thebending roll on the shaft 6and the holding roll 25 and taken to the truck or other place ofdisposal for the bentarticle's. An-

. other article to be bent can be Aprocured during the time the shaft 6is being rotated to its initial position so that vwhenthe lever 56 hasdog 57 engaging the stop 6() and the machine has ceased operating, thcsecond article will be in position to be. gripped between the bendingroll and the holding rollU 25, and the above described operation againrepeated.

`It will be vunderstood from the foregoing description thatthe'operation of the machine just described is extremely easy toperform, is not fatiguing to the operator and does not require themanipulation of many levers or other devices at any time or of anylevers at the time when the operator should be giving some attention tothe articles being bent. For example, only one lever, namely, lever 40,

needs to bev actuated prior to the time the articles to be bent aregripped against the bending roll. After the article is gripped inbending position only one other lever needs to be actuated, this beinglever 56. after which the operation of the machine is naturallyautomatic until the lever 40 is to be actuated I to release theworkblank. The entire operation is therefore, semi-automatic.

It will also be readily apparent to those vmake because of the form,

skilled inlthe art from the foregoing description of the apparatus thatwe have constructed an apparatus which is extremely easy to the partscomprising the apparatus, which is compact and which does not requirevery much ioor space,vall as contrasted with bending machines used priorto our invention.

It will'also be evident to those skilled in the art that we haveprovided a supporting means for the bending roll is of relatively smallarea and size adjacent to the roll and follower as a result of which itis possible to make a wide variation of sizes and varieties of bends.For example, a bend can be made in one plane followed by a bend of up toor in excess of 180 in another plane without obstruction being offeredby theI roll support.

Although various changes, alterations and modifications in the`foregoing apparatus may be suggested by those skilled in the art withoutinvolving invention, all such changes, alterations and additions fallwithin the scope and spirit of our invention. The scope of our inventionis defined in what is claimed.

What is claimed is:

1. A .bending machine comprising a rotatable bending roll, aholdingmember having a supporting roll associated therewith, sai holdingmember and roll being movable toward and away from the bending roll inadirection radial of the latter, means for actuating the holding membertoward the bending roll, means for automatically moving the holdinmember away from the bending roll when t e last saidmeans is in releasedposition, and means including astarting lever for rotating, reversingand finally stopping the bending roll. t

2. A bending machinecomprising a rotatable bending roll, a holdingmember and a supporting means therefor, said member and supporting meansbeing movable toward and away `from the bending roll radially of thelatter, pneum tic means for actuating thev holding membrtoward thebending roll, and means including a starting lever forvrotating thebending roll a predetermined distance, reversing the direction ofrotation and stopping the roll in its initial position.

3. bending machine comprising a rotatable bending roll, a holdisupportingv roll therefor, said holding member and roll beingmovabletoward and away from the bending roll, pneumatic means foractuating the'holding member toward and maintaining it in operativeposition with respect to said bending roll, and means including astarting lever for rotating the bending roll predetermined distances inone direction and then in the opposite direction.

` 4. A bending machine comprising a pedestal, an upright bending rollshaft therein, a bending roll on the. shaft, a bed extending size andfeature of and follower shoe which member and a laterally from thepedestal, a holding roll article gripping position and means forrotattal having an enlarged base ing the said shaft.

5. A bending machine com rising a pedestal having therein an upriglitbending-roll shaft, a drive gear in the lower ortion of the pedestal andon the said sha t, a bed extending laterally from the pedestal andcarrying a movable holding roll, a bending roll on the shaft rotatableabove the top of the said bed, means to rotate the shaft, two oppositelyrotating drive pulleys, clutch means engageable with one o the pulleysto rotate the shaft and automatic means for disengaging the clutch fromone pulley and engaging it with the other pulley.

6. A bending machine comprising a pedestal having therein an uprightbending-roll shaft provided with a drive gear disposed on its lower endand within the lower portion of the edestal, a bending roll on the upperend of t e said shaft, a bed extending laterally from the pedestal andcarrying a movable holding roll, means to rotate the shaft, two

oppositely rotating drive pulleys, clutch means engageable with one ofthe pulleys to rotate the s aft and means to disengage the clutch meansfrom said second pulley.

7. A bending machine com rising a pedestal havin therein an uprig tbending-roll shaft, a ged extending laterally from the pedestal andcarryin a movable holding roll, a bending roll on te shaft above thesaid bed, pneumatic means for moving the holding roll toward the bendingroll, manually controlled means for producing rotation of said shaft inone direction, automatically operable means f or arresting the saidrotatlon and reversing the rotation, and positive means to stop initialosition. l

8. A nding machine comprising a pedestal having an upri ht, rotatablebending roll slaft, means in t e lower portion of the pedestal'torotatethe shaft, a bendin roll on the upper end of said shaft, a be proectinglaterally from one side of the pedestal low said bending oll, a 'ppingmember movable on said bed towa and away from the roll and means toactuate said member.

9. A bending machine comprising a pedesand a relatively l small top ascom ared therewith, an upri ht .tal extending bendin roll sha rotatablymounted wit 'n the pe estal, a drive gear on the shaft within theenlarged base, a narrow bed of substantially the same width as the topof the pedesf laterally therefrom, a bending roll carried y the saidshaft above the said bed, means carried by the bed for holding anarticle to be bent against the bending roll,

rotation of the shaft at itsA means for rotatin the said bending rollshaft, and means or actuating the article holding means.

10. A pipe bending machine comprising a bending roll rotatable about avertical axis, means for rotating said roll, a single keeper roll freelrotatable about an axis parallel4 to that o the bending roll, means forvarying the distance between said axes, along the line joining thecenters of the rolls, and a follower shoe movable endwise between a tubeand the keeper roll and at right angles to the said center to centerline.

11. A pipe bending machine comprising a rotatable bending roll, meansfor rotating said roll, a keeper roll freely rotatable about an axisparallel to that of the bending roll, means for moving the axis of oneroll relative to the other, and a follower shoe in- `sertable betweenthe keeper roll and a tube and disposed tangentially to the peripheriesof both rolls at the intersections therewith of a line joining thecenters of the rolls.

12. A pipe bending machine comprising a vertical pedestal having anenlarged base portion and a smaller top portion, an elongated bed ofapproximately the width of the said top portion extending horizontallyfrom the top of the pedestal, a vertical shaft rotatably mounted in thepedestal, means in the said base portion for rotating the shaft, abending roll on the shaft abovev the bed, means movable lengthwise ofthe bed into and out of operative position with respect to the bendingroll, means, including fluid under pressure, for semi-automaticallymoving the last said means toward and away from the bending roll, andmeans, including fluid under pressure, for semi-automatically rotatingand restoring the saidshaft to its initial position.

13. A pipe bending machine having a vertical pedestal housing,'\avertical shaft, means y in the base of the pedestal for rotating theshaft, a bed extending horizontally from the top of the pedestal, abending roll on the shaft above. and of a diameter at leastsubstantially as at as the width of the bed, a keeper slida lelengthwise of the bed, fluid pressure means for moving the keeper towardthe said roll including a piston, cylinder and control yalve carried Abythe bed, spring means for retracting the said keeper, andv means forrotating the said shaft.

14. A pipe bending machine having a vertical pedestal housing, avertical shaft, means in the base of the pedestal for rotating theshaft, a, bed extending horizontally from the top of the pedestal, abending roll on the shaft above and of a diameter at least subcontrolvalve, means for retracting the said the bending keeper, and means forrotating the said shaft.

15. A pipe bending machine having a vertical pedestal housing, avertical shaft, means in the base of the pedestal for rotating the.shaft, a bed extending horizontally from the top of the pedestal, abending roll on the shaft above the bed, a. keeper slidable length,-wise of the bed, means to move the keeper toward and away from the saidroll, means for rotating said shat including a clutch and a clutchcotrol lever, and means for stopping, reversing and again stopping therotation of said shaft including a cylinder, piston and control valve.

16. A pipe bending machine comprising a bending roll, manual means forcausing rotation of the roll in one direction, automatic means forcausing stoppage, reverse rotation and inal stoppage of the said roll,including a fluid pressure cylinder and piston, a valve controlling thesame and means for actuating the valve, a keeper and manual means foractuating the keeper to move the latter towards the bending roll.

17. A pipe bending machine comprising a bending roll, means for rotatingthe roll in either direction including selectively employed clutches,manually operable means for selecting one clutch thereby rotating theroll in one direction, means for selecting the other clutch therebyreversing the direction of rotation of the roll, including a iuidpressure cylinder-and piston, a valve for controlling admission of fluidunder pressure into said cylinder and valve actuating means controlledby said roll, a keeper, and means :for

actuating the keeper.

`18. A pipe bending machine comprising a keeper, manual means forinitially actuatA the roll, and means. for controlling the rollincluding a fluid pressure cylinder and piston and a valve forcontrolling the same, the first said valve being connected with andserving also as a' control for the second said valve,

the 4latter having manually loperable means associated therwith toinitiate rotation of ro i f 20. A bending machine comprising incombmation` a bending roll, means for rotating I the same for bendingmovement and for rotating it in the opposite direction, a holding roll,fluid pressure means for actuating the holding roll toward the bendingroll on the center to center line of the rolls to press an article to bebent against the bending roll, and means for automatically retract'mgthe holding roll when the bending roll reaches the end of its bendingmovement and before the latter is rotated in the reverse direction.

In testimony `whereof We hereunto aliix l our signatures this 11th dayof April, 1926.

HARRY E. HARVEY. EARL K.v HOLMES.

